I very new at roses! I've had a garden, flowers, etc... we just moved into a house that has 10 rose plants. good size! i live in a warmer climate, which right now the temp day time is approx. 78-81 degrees. night time cools down quite a bit. just need a few helpful hint on trimming, watering, (well, everything) because we do live in a warmer area, these roses are beautiful. just trying to keep it that way. please help. thank you!!!!!!!1

Hi.. I,m just catching this post now-3yrs later!!- but, oh well, ... I think the problem you,re describing, is something called 'blackspot'. It,s a fungus that can overwinter on the ground and on the plant. Eventually, if it hasn,t already, it can kill the rose, by weakening it. Things I,ve tried and read about, is to make sure you collect as much of the fallen leaves contaminated with it, and dispose of it in the garbage-not your compost-. Mulching,helps prevent the fungus from spraying up onto the leaves when it,s raining or being watered. Spraying the roses affected, in the first of the spring helps too. Use a lime/sulpher dormancy oil spray, just before the leaf buds come out with new growth. Usually, about the time the forsythia is blooming around my area( Hamilton, Ontario) ,which is pretty close to your own area zone-wise.(5-6) . Some people swear by using a mix of baking soda /water/mild soap to spray on the leaves in between rains. Or, even a mix of water and milk. I think ,from my own attempts, those are less affective. In the end, it,s virtually impossible to completely illiminate it,once it,s introduced to your garden. Nearly every garden has it,and it,s very common to roses in particular. Good strong plants and resistant varieties and good hygiene are your best bets in this game. Good luck,and hope it,s not too late for all of this imput! Lenage.

I think I would spray my roses for Black Spot. There is a good solution out there called Rose Pride. It is a pretty comprehensive spray for rose bushes that takes care of BS.
Fungenex is also good. Its a good idea to use about 3 different types of sprays and rotate them so that your fungus doesn't build up and immunity to the spray you use.
As the year goes by, pick up any leaves that fall onto the ground. They can pass on the fungus to other bushes and your bush later one.
I spay my bed with a Lime Sulphur salution in the fall and the winter to kill any Black Spot spores that are over wintering in my bed.
If you want an organic way to do that , there is a salution of Baking Soda, canola oil and water that you can use to take care of it. I dont have the exact recipe, but you can find it online pretty easy in any organic gardening forum if you like.
Good luck.